CN105951856A - Construction method and structure of underwater reinforced concrete combined suspension-box cofferdam free of bottom-sealing concrete - Google Patents
Construction method and structure of underwater reinforced concrete combined suspension-box cofferdam free of bottom-sealing concrete Download PDFInfo
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- CN105951856A CN105951856A CN201610462627.8A CN201610462627A CN105951856A CN 105951856 A CN105951856 A CN 105951856A CN 201610462627 A CN201610462627 A CN 201610462627A CN 105951856 A CN105951856 A CN 105951856A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- General Engineering & Computer Science (AREA)
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Underground Or Underwater Handling Of Building Materials (AREA)
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Abstract
The invention discloses a construction method and structure of an underwater reinforced concrete combined suspension-box cofferdam free of bottom-sealing concrete. The construction method comprises the following steps: after pile foundation construction is finished, manufacturing a suspension box; mounting carrying pole beams and continuous jacks on pile casings as lowering devices of the suspension box; slowly lowering the suspension box in place with the jacks; and pouring underwater undispersed concrete between a bottom board and annular stepped grooves of the pile casings. According to the technological method, the suspension box stops water by virtue of the reinforced concrete bottom board and the underwater undispersed concrete, which can thoroughly break through the conventional construction method in which bottom sealing is indispensable in construction of an underwater bridge/wharf pile cap suspension box cofferdam, saves a great amount of concrete and steel, reduces the construction cost, simplifies construction procedures and shortens the construction period; and the method is simple in process and convenient to operate, has a good water-stopping effect and a wide application range, has low requirements on ambient environment, corollary equipment and operation level of workers, and has high popularization and application values.
Description
Technical field
The present invention relates to civil construction technical field, a kind of steel reinforced concrete without back cover being applicable to the industry inland rivers such as highway, railway, municipal administration, water transport, water conservancy and hydropower or Offshore Bridges high-rise pile cap, harbour high-rise pile cap or the construction of ship lock dolphin combines suspension box-cofferdam construction method and structure.
Background technology
At present, in water Bridge or harbour foundation construction, the waterproof cofferdam of employing substantially has: the forms such as steel sheet-pile cofferdam, opening locked steel tube pilecofferdam, Double-Wall Steel Boxed Cofferdam, reinforced concrete bi-flexural beam, bottomless steel jacket box and bottom board steel lifting box cofferdam.Wherein, steel suspended box cofferdam has that the construction period is short, is not required to sink to the feature such as riverbed, few, the economical rationality of material usage, and oneself is widely used in deep-water bridge or the construction of harbour High-Rise Pile Cap Foundation.
Steel suspended box cofferdam encloses water generally by the bottom concrete on the side plate of box and base plate, provides anhydrous construction environment for bearing platform construction.Bottom concrete is very important one procedure in steel lifted trunk construction.Owing to bottom concrete side's amount is relatively big, and being underwater pouring, workability, slow setting time and construction technology etc. for concrete require higher, and construction risk is bigger.If once back cover failure, it will extremely difficult process.And cushion cap bottom concrete is only belonging to interim measure of constructing, but bottom concrete side's amount but accounts for the 30%～50% of cushion cap concrete square amount, and construction cost is relatively large.Therefore steel suspended box cofferdam the most just becomes bridge, terminal designs and construction technical staff without bottom concrete construction technology research and needs the problem of research badly.
The research in this respect of Transbay Bridge, Qingdao achieves certain breakthrough, and obtain a patent of invention (title: underwater no-bottom closing concrete boxed cofferdam and application process thereof, the patent No.: ZL200710113358.5) and a utility model patent (title: underwater no-bottom closing concrete boxed cofferdam, the patent No.: ZL200720029353.X).Its main innovation point is the mode using capsule sealing between steel lifted trunk base plate and pile foundation steel pile casting, it is achieved that steel lifted trunk is constructed without bottom concrete.But suspended steel box design and manufacture, operative's level and relevant corollary equipment etc. are required higher by this technology, slightly mistake will affect stagnant water effect, if it occur that drainage, deal with and can bother very much, and the locating effect of steel lifted trunk is had an impact by capsule sealing mode.Therefore this technology is promoted the use of the most at home.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam construction method and structure.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam construction method, comprises the following steps,
1), after pile foundation construction completes, box is made；
2) shoulder pole girder and the continuous jack downward putting device as box is installed on casing；
3) use continuous jack slowly to be transferred by box to put in place；
4) downward putting device is removed；
5) between the ring ladder groove of base plate and casing, non-dispersible underwater concrete is irrigated；
6), take the water in box away, cut off the casing projection in base plate upper end, the inner support of casing is installed；
7) bearing platform construction；
8) side plate of box is removed.
As a preference, step 1) includes
1.1) remove the platform used by pile foundation construction and carry out base plate and the making of side plate piecemeal of box simultaneously；
1.2), when selecting low water level, casing is welded steel corbel, sets up temporary platform；
1.3) assembled base plate in temporary platform；
1.4) side plate of assembled box.
As a preference, while step 4) removes downward putting device, it is welded strut and tie.
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam structure, including box, described box includes base plate, side plate, it is provided with perforate on described base plate, described perforate is provided with casing, the edge of described perforate has ring ladder groove, is filled with the blocking concrete layer that non-dispersible underwater concrete is formed between described ring ladder groove and casing.
As a preference, the blocking concrete layer lower end between described ring ladder groove and casing is provided with sealing collar.
As a preference, described side plate connects support tube.
As a preference, described side plate connects I-shaped support beam.
As a preference, described blocking concrete layer uses slightly expanded concrete.
Connect as a preference, described casing and base plate and have strut and tie.
The invention has the beneficial effects as follows: this process uses reinforced concrete floor and non-dispersible underwater concrete sealing mode to box, can thoroughly break water Bridge, the conventional construction method of the necessary back cover of harbour cushion cap suspension box-cofferdam construction, a large amount of concrete and steel can be saved, reduce construction cost, and simplify operational procedure, the construction period can be saved, technique is simple, simple operation, stagnant water effect is good, applied widely, the highest to surrounding, corollary equipment and operative's level requirement, there is good application value.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the front view of the present invention；
Fig. 2 is the top view of the present invention；
Fig. 3 is the construction process schematic diagram of the present invention.
Detailed description of the invention
In order to make the purpose of the application, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.For the thorough explanation present invention, following description can relate to some specific detail.And when not having these specific detail, the present invention then may still can realize, i.e. technical staff in art uses these descriptions herein and statement others skilled in the art in art effectively to introduce their work essence.With reference to Fig. 1, Fig. 2, Fig. 3, a kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam construction method, comprise the following steps,
1), after pile foundation construction completes, box 1 is made；
2) shoulder pole girder 7 and continuous jack 71 downward putting device as box 1 is installed on casing 5；
3) use continuous jack 71 slowly to be transferred by box 1 to put in place；
4) downward putting device is removed；
5) between the ring ladder groove 41 of base plate 2 and casing 5, non-dispersible underwater concrete is irrigated；
6) take the water in box 1 away, cut off the projection that casing 5 is held on a base plate 2, the inner support of casing 5 is installed；
7) bearing platform construction；
8) side plate 3 of box 1 is removed.
Whole process, without pouring into a mould bottom concrete again, i.e. sets the bottom concrete structure that a small amount of blocking concrete layer 6 replaces the box tunneling boring scope of routine around the casing 5 of pile foundation.
Box 1 uses reinforced concrete floor and microdilatancy concrete capable of not dispersing sealing mode under water, can thoroughly break water Bridge, the conventional construction method of the necessary back cover of harbour cushion cap suspension box-cofferdam construction, a large amount of concrete and steel can be saved, reduce construction cost, and simplify operational procedure, can save the construction period, technique is simple, simple operation, stagnant water effect is good, applied widely, the highest to surrounding, corollary equipment and operative's level requirement, there is good application value.
Step 1) includes
1.1) remove the platform used by pile foundation construction and carry out base plate 2 and the side plate 3 of box 1 simultaneously) piecemeal making；
1.2), when selecting low water level, casing 5 is welded steel corbel, sets up temporary platform 8；
1.3) assembled base plate 2 on temporary platform pile foundation construction；
1.4) side plate 3 of assembled box 1.
The i.e. side plate 3 of box 1 and base plate 2 carries out piecemeal making on land, then more than the water surface assembled, then use jack 71 of working continuously to transfer to put in place, reduce the difficulty of construction further, improve construction flexibility ratio at pier position.
It is welded strut and tie 51 while step 4) removes downward putting device, improves engineering efficiency further.
In addition it should be noted that; in describing below, the word " front side " of use, " rear side ", " left side ", " right side ", " upside ", " downside " etc. refer to the direction in accompanying drawing; word " interior " and " outward " refer respectively to the direction towards or away from particular elements geometric center, and person skilled should not be construed as the technology beyond the application protection domain in the adjustment that above-mentioned direction is made simply, be need not creativeness.Should be appreciated that specific embodiment described herein, only in order to explain the application, is not used to limit real protection scope.And for avoiding confusion the purpose of the present invention, owing to the technology of the manufacture method known, control program, part dimension, circuit layout etc. is not it will be understood that therefore they are described in detail.
With reference to Fig. 1, Fig. 2, a kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam structure, including box 1, described box 1 includes base plate 2, side plate 3, described base plate 2 is provided with perforate 4, casing 5 is had at described perforate 4, the edge of described perforate 4 has ring ladder groove 41, the blocking concrete layer 6 that non-dispersible underwater concrete is formed it is filled with between described ring ladder groove 41 and casing 5, blocking concrete layer 6 is non-dispersible underwater concrete, setting a small amount of blocking concrete layer 6 around casing 5 replaces the bottom concrete structure of conventional box tunneling boring scope i.e. to can reach sealing and the purpose to casing 5 location at casing 5.Owing between ring ladder groove 41 and casing 5, space is the least, and it is underwater construction, if blocking concrete layer 6 uses conventional subsea concrete, it is difficult to ensure quality of concreting, therefore have employed non-dispersible underwater concrete.Non-dispersible underwater concrete has the strongest dispersion resistance and preferable mobility, realize the Self-leveling of underwater concrete, self-compaction, cement and aggregate dispersion during suppression underwater construction, and do not pollute construction waters, both the effect of sealing can have been reached, location can also be reached and the effect of vertical frictional resistance is provided, the effect of conventional steel box bottom concrete can be served completely.
Further embodiment, with reference to a kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam structure of Fig. 1, Fig. 2, " embodiment " the most referred to herein refers to may be included in special characteristic, structure or the characteristic at least one implementation of the application.Different in this manual local " in the embodiments " occurred not refer both to same embodiment, are not single or the most mutually exclusive with other embodiments embodiment.Embodiment includes box 1, box 1 uses steel and concrete combined structure, base plate 2 uses reinforced concrete structure, for full steel structure base plate, can save great deal of steel, and surrounding water will not be polluted after terminating by engineering, side plate 3 uses steel construction, size does not limits, and can be adjusted according to cap design of pile situation.Described box 1 includes base plate 2, side plate 3, and described base plate 2 is provided with perforate 4, and having casing 5, casing 5 at described perforate 4 is steel equally.The edge of described perforate 4 has ring ladder groove 41, is filled with the blocking concrete layer 6 that non-dispersible underwater concrete is formed between described ring ladder groove 41 and casing 5.Blocking concrete layer 6 lower end between described ring ladder groove 41 and casing 5 is provided with sealing collar 61.Sealing collar 61 is set in base plate 2 and every pile foundation steel pile casting junction of steel lifted trunk, after steel lifted trunk is transferred and put in place, at sealing collar 61 underwater grouting non-dispersible underwater concrete, to reach to improve stagnant water effect and the purpose of accurate positioning.Described blocking concrete layer 6 uses slightly expanded concrete, extender in slightly expanded concrete, make concrete can rely on the effect of extender during aquation, elapse over time, there is certain free wxpansion amount, thus compensate for the contraction of concrete, reach to prevent and treat distress in concrete, improve the purpose of concrete performance.Blocking concrete layer 6 and sealing collar 61 form waterstop, and waterstop width is 20～40cm, and the degree of depth is 40～80cm.
Further embodiment, with reference to Fig. 1, a kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam structure of Fig. 2, including box 1, described box 1 includes base plate 2, side plate 3, perforate 4 is had on described base plate 2, the side plate 3 of box 1 uses steel construction, to facilitate installation, remove and fall to use, the base plate 2 of box 1 uses steel construction, casing 5 is had at described perforate 4, the edge of described perforate 4 has ring ladder groove 41, the blocking concrete layer 6 that non-dispersible underwater concrete is formed it is filled with between described ring ladder groove 41 and casing 5, described side plate 3 connects support bar 31, to improve structural strength at the side plate 3 of box 1.Described side plate 3 connects I-shaped support beam 32, makes side plate 3 more firm further.Described casing 5 and base plate 2 connect strut and tie 51, it is ensured that the deadweight of box 1 and after draining water anti-floating power can pass to casing 5 by base plate 2, it is ensured that box safety.
When real work, idiographic flow is summarized as follows:
Step one: after pile foundation construction completes, removes steel platform, synchronizes to carry out box base plate and side plate piecemeal makes.
Step 2: when selecting low water level, be welded steel corbel at pile foundation steel pile casting, set up temporary steel platform.
Step 3: assembled box base plate on temporary steel platform.
Step 4: assembled suspension box side sheet.
Step 5: install the steel case lowering system such as shoulder pole girder and continuous jack on steel pile casting.
Step 6: use continuous jack lowering system slowly to be transferred by box and put in place.
Step 7: be welded strut and tie, removes lowering system.
Step 8: irrigate non-dispersible underwater concrete between box base plate and steel pile casting.
Step 9: steel lifted trunk is changed by Force system, draws water, and cuts off steel pile casting, installs inner support.
Step 10: bearing platform construction.
Step 11: steel lifted trunk sidewall is removed.
According to above-mentioned principle, the present invention can also carry out suitable change and amendment to above-mentioned embodiment, the such as base plate without bottom concrete steel reinforced concrete combination suspension box-cofferdam can also use girder steel to add concrete board constructions and make, can also all use structure steel fabrication, waterstop between box base plate and steel pile casting can do circular, square or polygon can also be made, etc..Therefore, the invention is not limited in detailed description of the invention disclosed and described above, should also be as some modifications and changes of the present invention falling in the scope of the claims of the present invention.
Claims (10)
1. a underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam construction method, it is characterised in that comprise the following steps,
1), after pile foundation construction completes, box (1) is made；
2) shoulder pole girder (7) and continuous jack (71) downward putting device as box (1) is installed on casing (5)；
3) use continuous jack (71) slowly to be transferred by box (1) to put in place；
4) downward putting device is removed；
5) between the ring ladder groove (41) of base plate (2) and casing (5), non-dispersible underwater concrete is irrigated；
6) take the water in box (1) away, cut off the casing (5) projection in base plate (2) upper end, the inner support of casing (5) is installed；
7) bearing platform construction；
8) side plate (3) of box (1) is removed.
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 construction method, it is characterised in that step 1) includes
1.1) remove the platform used by pile foundation construction and carry out base plate (2) and the making of side plate (3) piecemeal of box (1) simultaneously；
1.2), when selecting low water level, casing (5) is welded steel corbel, sets up temporary platform (8)；
1.3) assembled base plate (2) on temporary platform pile foundation construction；
1.4) side plate (3) of assembled box (1).
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 construction method, it is characterised in that be welded strut and tie (51) while removing downward putting device in step 4).
4. a underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam structure, including box (1), described box (1) includes base plate (2), side plate (3), perforate (4) it is provided with on described base plate (2), described perforate (4) is provided with casing (5), it is characterized in that, the edge of described perforate (4) has ring ladder groove (41), is filled with the blocking concrete layer (6) that non-dispersible underwater concrete is formed between described ring ladder groove (41) and casing (5).
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that described base plate (2) uses reinforced concrete structure.
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that blocking concrete layer (6) lower end between described ring ladder groove (41) and casing (5) is provided with sealing collar (61).
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that described side plate (3) connects support tube (31).
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that described side plate (3) connects I-shaped support beam (32).
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that described blocking concrete layer (6) uses slightly expanded concrete.
A kind of underwater non-bottom concrete steel reinforced concrete combination suspension box-cofferdam the most according to claim 1 structure, it is characterised in that described casing (5) and base plate (2) connect strut and tie (51).
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044129A (en) * | 2017-01-20 | 2017-08-15 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel and its construction method |
| CN107447767A (en) * | 2017-08-10 | 2017-12-08 | 重庆水利电力职业技术学院 | A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method |
| CN107989054A (en) * | 2017-12-08 | 2018-05-04 | 中国铁建港航局集团有限公司 | It is a kind of applied to underwater flush type cushion cap without bottom concrete steel lifted trunk structure |
| CN108149636A (en) * | 2017-12-14 | 2018-06-12 | 广东海工建设工程有限公司 | A kind of temporary wharf and its construction method |
| CN108643213A (en) * | 2018-05-18 | 2018-10-12 | 中交路桥华南工程有限公司 | The construction method of underwater bearing platform construction structure |
| CN108643207A (en) * | 2018-06-11 | 2018-10-12 | 广西路建工程集团有限公司 | Exempt from bottom concrete steel lifted trunk side plate and bottom board connector and its construction method |
| CN108643206A (en) * | 2018-06-11 | 2018-10-12 | 广西路建工程集团有限公司 | Exempt from bottom concrete steel lifted trunk bottom plate and steel pile casting attachment device and its construction method |
| CN110080268A (en) * | 2019-06-11 | 2019-08-02 | 中交一航局第二工程有限公司 | Underwater cast-in-place pile and casing connection structure and attaching method thereof |
| CN110499710A (en) * | 2019-08-29 | 2019-11-26 | 中天路桥有限公司 | A kind of underwater constructing tie beam device of small hanging box and its technique |
| CN110820782A (en) * | 2019-12-05 | 2020-02-21 | 中国铁建大桥工程局集团有限公司 | Novel underwater bottom-sealing-free steel concrete combined hanging box and lowering method thereof |
| CN110952579A (en) * | 2019-10-23 | 2020-04-03 | 中建路桥集团有限公司 | Double-wall steel hanging box cofferdam and construction method thereof |
| CN111894025A (en) * | 2020-07-28 | 2020-11-06 | 中交路桥华南工程有限公司 | Construction method of underwater bearing platform and cofferdam structure |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107044129A (en) * | 2017-01-20 | 2017-08-15 | 中国葛洲坝集团第六工程有限公司 | A kind of bottomless single wall steel boxed cofferdam of piecemeal pin-connected panel and its construction method |
| CN107447767A (en) * | 2017-08-10 | 2017-12-08 | 重庆水利电力职业技术学院 | A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method |
| CN107447767B (en) * | 2017-08-10 | 2019-02-26 | 重庆水利电力职业技术学院 | A kind of prefabricated reinforced concrete bottom plate steel lifted trunk and its construction method |
| CN107989054A (en) * | 2017-12-08 | 2018-05-04 | 中国铁建港航局集团有限公司 | It is a kind of applied to underwater flush type cushion cap without bottom concrete steel lifted trunk structure |
| CN108149636A (en) * | 2017-12-14 | 2018-06-12 | 广东海工建设工程有限公司 | A kind of temporary wharf and its construction method |
| CN108643213A (en) * | 2018-05-18 | 2018-10-12 | 中交路桥华南工程有限公司 | The construction method of underwater bearing platform construction structure |
| CN108643206A (en) * | 2018-06-11 | 2018-10-12 | 广西路建工程集团有限公司 | Exempt from bottom concrete steel lifted trunk bottom plate and steel pile casting attachment device and its construction method |
| CN108643207A (en) * | 2018-06-11 | 2018-10-12 | 广西路建工程集团有限公司 | Exempt from bottom concrete steel lifted trunk side plate and bottom board connector and its construction method |
| CN108643207B (en) * | 2018-06-11 | 2024-02-20 | 广西路建工程集团有限公司 | Device for connecting side plate and bottom plate of bottom sealing-free concrete steel hanging box and construction method thereof |
| CN110080268A (en) * | 2019-06-11 | 2019-08-02 | 中交一航局第二工程有限公司 | Underwater cast-in-place pile and casing connection structure and attaching method thereof |
| CN110499710A (en) * | 2019-08-29 | 2019-11-26 | 中天路桥有限公司 | A kind of underwater constructing tie beam device of small hanging box and its technique |
| CN110952579A (en) * | 2019-10-23 | 2020-04-03 | 中建路桥集团有限公司 | Double-wall steel hanging box cofferdam and construction method thereof |
| CN110820782A (en) * | 2019-12-05 | 2020-02-21 | 中国铁建大桥工程局集团有限公司 | Novel underwater bottom-sealing-free steel concrete combined hanging box and lowering method thereof |
| CN111894025A (en) * | 2020-07-28 | 2020-11-06 | 中交路桥华南工程有限公司 | Construction method of underwater bearing platform and cofferdam structure |
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| CN105951856B (en) | 2018-02-02 |
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